Given this recent bad luck streak, and thus looking at the graph and seeing the "Maximum reward" filled area, I can't help but to ask one question concerning this pool:

So, if the pool has no buffer funds it means that in case a given block takes a long time to solve then the value per share will drop in order to keep the total volume of shares multiplied by value to be more or less 50 BTC. Consequentially if the following block would be solved in little time then each share would have a greater value to make up for the reduced payment on the last block.

My question is though, does the pool track the individual effort of each user so that it rewards a particular user more until the value of his work is compensated?

i.e: Suppose there's a very long block which substantially brings down the per share value, then several quick blocks. The large block took about 20 hours to find, and a given user (Let's say he has 1500MH/s available, generates 1200 shares/hour or something) was mining for about 19 hours and 40 minutes of this block but then stopped - Let's say there was a power outage for the next few hours. He will of course receive the reduced share value multiplied by all of his work done so far, but what about afterwards? Given that the next few blocks are quick, everyone that keeps mining will receive much more value/share until the value of the shares of the long block is made up for, but what about the user that was made unable to mine during that period? Will he just lose the right to that compensation or the system adjusts the share value for him in the future?